Snakes are 'righties'–with their penis, that is.

Here’s a fun fact to break out at your next cocktail party: male snakes have two complete sets of reproductive organs, one on the right side of their body, and another on the left. This includes two separate hemipenes, which are the snake equivalent to a penis that pop out of the body during sex. Here, scientists determined that although the right-side reproductive system of gartersnakes is significantly larger than the left, each is used about half the time in the wild, often alternating fr